CAST and ovarian neoplasm: Ovarian tumours of the serous type were associated with high expression of calpastatin (χ2 = 23.755, d.f. = 4, P < 0.001), high calpain-1 (χ2=15.961, d.f. = 4, P = 0.003) and high calpain-2 (χ2 = 26.02, d.f. = 4, P < 0.001).